1 package org.apache.lucene.store;
4 * Licensed to the Apache Software Foundation (ASF) under one or more
5 * contributor license agreements. See the NOTICE file distributed with
6 * this work for additional information regarding copyright ownership.
7 * The ASF licenses this file to You under the Apache License, Version 2.0
8 * (the "License"); you may not use this file except in compliance with
9 * the License. You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
20 import java.io.IOException;
22 import org.apache.lucene.store.SimpleFSDirectory.SimpleFSIndexInput;
24 /** This class provides access to package-level features defined in the
25 * store package. It is used for testing only.
27 public class _TestHelper {
29 /** Returns true if the instance of the provided input stream is actually
30 * an SimpleFSIndexInput.
32 public static boolean isSimpleFSIndexInput(IndexInput is) {
33 return is instanceof SimpleFSIndexInput;
36 /** Returns true if the provided input stream is an SimpleFSIndexInput and
37 * is a clone, that is it does not own its underlying file descriptor.
39 public static boolean isSimpleFSIndexInputClone(IndexInput is) {
40 if (isSimpleFSIndexInput(is)) {
41 return ((SimpleFSIndexInput) is).isClone;
47 /** Given an instance of SimpleFSDirectory.SimpleFSIndexInput, this method returns
48 * true if the underlying file descriptor is valid, and false otherwise.
49 * This can be used to determine if the OS file has been closed.
50 * The descriptor becomes invalid when the non-clone instance of the
51 * SimpleFSIndexInput that owns this descriptor is closed. However, the
52 * descriptor may possibly become invalid in other ways as well.
54 public static boolean isSimpleFSIndexInputOpen(IndexInput is)
57 if (isSimpleFSIndexInput(is)) {
58 SimpleFSIndexInput fis = (SimpleFSIndexInput) is;
59 return fis.isFDValid();